Forgive me if you already know ...
C requires a stack (at least), sometimes more for sake of minimizing the
surprise factor (for developers who think it's always a Unix thing).
After that, there's not much difference (in my experience) to call a C
routine than to call an assembler routine.
There's nothing in the code you got from ChatGPT which would instantiate
the expected stack and supplemental environment.
Have you called COBOL from assembler? Similar game there, and similar
instantiation req (LE and whatever it has evolved into these days).
I hope this helps.
-- R; <><
On 6/6/23 11:27, Dave Clark wrote:
Would someone show me an example of calling a C function from
HLASM? I tried asking ChatGPT and got the following. I don't see how
this will link from HLASM to the C function.
PRINT NOGEN
TITLE 'HLASM Calling ldap_open'
USING *,12
LR 12,15
LA 15,SAVEAREA
ENTRY START
SAVEAREA DS 18F
LDAP_OPEN EQU *
DROP 0
LR 15,13
BALR 14,15
USING LDAP_OPEN,14
DROP 1
L 1,LDAP_HOSTNAME
L 2,LDAP_PORT
L 3,LDAP_RESULT
BALR 14,15
USING LDAP_OPEN,14
DROP 0
L 15,SAVEAREA
RETURN (14,12),RC=0
START DS 0H
...
... ; HLASM code
...
LA 1,LDAP_HOSTNAME
LA 2,LDAP_PORT
LA 3,LDAP_RESULT
BALR 14,15
USING LDAP_OPEN,14
...
... ; Continue with HLASM code
...
PRINT NOGEN
END START
Sincerely,
Dave Clark
